One problem related to electrical system has been reported for the 1996 Audi A6. The most recently reported issues are listed below.
My 1996 Audi A6 check engine light continually come on. Repeated visits to Audi dealer. Spent several hundreds of $ with no sucess. I now visit them every week to have it turned off to come on again and again. I will be thinking of riding of thr car and going back to Honda's. They have never failed me.